Weird problem with date/time in iNotes

We’ve started to deploy iNotes Web Access for home/mobile users, and faced this problem:

every time the user press Start Sync in iNotes Sync Manager the warning appears

as you can see in the picture - real time difference is 25 seconds.

We’ve tried to change regional options for Date/time - and no success. The same warning for every sync operation.

Please advise what can be done to avoid that warning.

(after pressing “OK” sync goes without any error)

brgds

A.D.